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| Vintage Audio (record players, hi-fi etc) Amplifiers, speakers, gramophones and other audio equipment. |
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27th May 2019, 9:35 am
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#1 |
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Pentode
Join Date: Aug 2013
Location: Doddington Park, Lincoln, Lincolnshire, UK.
Posts: 209
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Invertor.
So many on the market, 12v - 240V to power a Dansette on a budget any recommendations ?
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27th May 2019, 10:46 am
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#2 |
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Dekatron
Join Date: Jul 2008
Location: Charmouth, Dorset, UK.
Posts: 3,601
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Re: inverter
You might get away with a modified sine wave inverter if its a valve player, they are very cheap, don't know if they like induction motors though. A low wattage pure sign wave unit shouldn't be too expensive, you probably need less than 100 watts.
Peter https://www.ebay.co.uk/sch/i.html?_f...sacat=0&_sop=2 |
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27th May 2019, 11:28 am
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#3 |
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Dekatron
Join Date: May 2008
Location: Derby, UK.
Posts: 7,735
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Re: inverter
You won't need a pure sine wave just for a record player. Back in the Days, when such a need existed, people used to use simple vibrator converters to power them! I have a little 150W modified sine wave inverter, bought from Maplin when they still existed, and I have used that to run a Dansette Major DeLuxe from a 12V rechargeable battery with no problems.
__________________
If I have seen further than others, it is because I was standing on a pile of failed experiments. |
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27th May 2019, 8:31 pm
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#4 |
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Dekatron
Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 8,194
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Re: Invertor.
Hi, it may be a problem if the inverter does not output 50Hz, as your gram will probably have an induction motor that is speed/ frequency dependant.
It needs to be a 50Hz type Ed |
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27th May 2019, 11:10 pm
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#5 |
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Dekatron
Join Date: Nov 2003
Location: Heckmondwike, West Yorkshire, UK.
Posts: 9,642
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Re: Invertor.
For a valve example, if you have the DVD look at the Ace 33RG/DC (Trader 1045). A multivibrator driving a pair of LOP valves.
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28th May 2019, 10:44 am
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#6 |
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Dekatron
Join Date: Jul 2008
Location: Charmouth, Dorset, UK.
Posts: 3,601
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Re: Invertor.
I remember a pre war radiogram at the shop where I used to work in kent, it had a valve inverter driving the gram motor, I think it was probably for use on DC mains.
Peter |
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28th May 2019, 4:47 pm
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#7 |
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Heptode
Join Date: Nov 2009
Location: Scarborough, North Yorkshire, UK.
Posts: 510
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Re: Invertor.
A friend of mine back in 1957/60 era had a valve inverter made by I think "VaLradio" or some similar name which he used to power his electric drill. He had a Jowett Javelin car with a metallic horn ring thing on the steering wheel and as we were driving along it all became alive. Ted
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28th May 2019, 8:09 pm
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#8 |
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Dekatron
Join Date: Nov 2003
Location: Heckmondwike, West Yorkshire, UK.
Posts: 9,642
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Re: Invertor.
For one of my past jobs I lugged a valve paging transmitter round for demonstration purposes. That had a Valradio inverter, doubling the weight. As I never used it portable I removed it. It came in useful during the 4 day week power cuts as it would power the old 405 TV for long enough for Wife and friends to watch Coronation Street, a trivial matter these days.
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29th May 2019, 8:28 am
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#9 |
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Pentode
Join Date: Aug 2013
Location: Doddington Park, Lincoln, Lincolnshire, UK.
Posts: 209
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Re: Invertor.
thanks so much for all your input stI'll pondering ! bob
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29th May 2019, 8:51 am
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#10 |
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Rest in Peace
Join Date: Mar 2011
Location: Basildon, Essex, UK.
Posts: 4,100
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Re: Invertor.
I seriously dont think those "Pure sine wave" inverters for £17 from China are real.
If you read the specs of some they do say "modified" sine wave. Mike |
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29th May 2019, 9:08 am
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#11 |
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Moderator
Join Date: Feb 2006
Location: Wembley, Middlesex
Posts: 7,224
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Re: Invertor.
Look at the Wolmar Velora which is also on the DVD, a UCC85 driving a pair of UL84's to drive the motor. It even has a frequency control to vary the pitch of the motor.
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